At any moment, I make a decision that is the Best I could do at that moment. So I have absolutely no regrets of any of my decisions. Some decisions turned out to be great turning points, some luckily worked out much better than expected and some happened to be utter failures.
Good thing is that those failures remained as failures just for a while, precisely, until I realize they were failures. It is lot easier to accept failures, if you just live in the present and look out in the future. Once I realize, make my next decision that could correct or go completely in a different direction.
And then, life goes on.